It allows you to perform bitwise AND, OR, XOR and NOT to numeric values.

Bitwise_and(value1, value2) - Returns value1&& value2
Bitwise_or(value1, value2) - Returns value1 || value2
Bitwise_xor(value1, value2) - Returns value1 ^^ value2
Bitwise_not(value) - Returns!value (note: this is a 32 bit NOT function)
Bitwise_shift_left(value) - Returns the values bits shifted left (overflow is lost)
Bitwise_shift_right(value) - Returns the values bits shifted right (underflow is lost)
Bitwise_rotate_left(value) - Returns the values bits rotated left
Bitwise_rotate_right(value) - Returns the values bits rotated right